Nigerian Roofing Guide Timber + Sheet Calculations Scam Prevention

Your carpenter’s list is not a prophecy. Verify it.

The Roofing Cost Bible is the complete Nigerian homeowner’s guide to roofing calculations — timber quantities, roofing sheet sqm, height-based cost adjustments, labour expectations, and scam prevention. Built from 25 years of real-site experience, it helps you budget confidently, avoid fake materials, and prevent costly roofing mistakes.

THE ROOFING COST BIBLE — The Complete Nigerian Guide to Accurate Roofing Estimates, Timber Quantities, Sheet Calculations & Scam Prevention

Buy the Book Now See Table of Contents PDF • Fast reference • Made for homeowners & professionals

Timber TablesBy building type + height multipliers

Sheet CalculationsStone-coated & aluminium methods

Protection SystemSpot scams & inflated estimates early

What You’ll Learn

This book turns roofing estimates into a simple system you can check: measurements → quantities → height multipliers → sheets → labour → accessories → verification.

Key Skills You Gain

Timber quantity calculationHow to estimate and verify 2×2, 2×3, 2×4, 3×4 selections.

Roof height cost impact (10ft–20ft)Multipliers for timber, sheets, and labour as heights increase.

Sheet calculation methodStone-coated in sqm; aluminium by effective coverage and overlap.

Labour & cost controlWhat to expect, where labour inflates, and how to fix the scope.

Accessories to prevent leaksRidges, hips, valleys, flashings, sealants—what matters and why.

Scam patterns & preventionHow inflated lists happen and the fastest way to challenge them.

Inspection checklistSupervise confidently and catch errors early before money is wasted.

Maintenance & lifespanExtend your roofing life and lower long-term repair expenses.

Who This Book Is For

Homeowners building in NigeriaUnderstand what you’re paying for and avoid overpricing.

First-time builders & familiesBudget better and reduce mistakes during roofing.

Developers & estate buildersStandardize costing across multiple units.

Site supervisors & foremenUse tables and checklists for quality control.

Carpenters and roofersTraining reference for clean estimates and professional quotes.

Students of building/constructionLearn roofing estimation systems that work on real sites.

Book Preview (Excerpt)

From the Introduction / How to Use This Book — a paste-ready preview for your website.

From the Introduction

Roofing is one of the most confusing, expensive and critical stages of building construction in Nigeria. Most homeowners have no idea:

• what quantity of timber is truly required,
• how many square meters of roofing sheets are correct,
• how roof height affects cost,
• or how to identify when a carpenter is giving inflated estimates.

This confusion leads to overpricing, wasted materials, wrong calculations poor roofing execution and budget overruns.

This book removes every form of guesswork from roofing. Inside, you will learn the exact:

• Timber quantities for each building type
• Accurate sheet calculations (stone-coated & aluminium)
• Height adjustments (10ft, 12ft, 15ft, 18ft, 20ft)
• Labour cost expectations
• Scam-prevention strategies
• Inspection steps, maintenance routines, and quick summary tables

Whether you are roofing a 2-bedroom, 3-bedroom, duplex, semi-detached, or multi-unit property — this book gives you clarity, accuracy, and confidence.

How to Use This Book

To get the best results:

• Know your building type (2-bedroom, 3-bedroom, duplex, etc.)
• Choose your roof height: 10ft, 12ft, 15ft, 18ft, or 20ft
• Check the timber table — use listed figures, don’t guess
• Apply the height factor — higher roofs = more timber + more labour
• Calculate sheet area correctly — stone-coated in sqm; aluminium by coverage
• Add 7% contingency — protects you from price changes & wastage
• Compare with your carpenter’s list — if suspicious, ask questions
• Use summary tables — estimate fast, even as a beginner

Quick Value:
Choose 15 ft for most Nigerian homes.
Choose 18 ft for premium comfort and beauty.
Choose 12 ft only for rentals and tight budgets.
Avoid 10 ft unless budget is extremely tight.

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Sample Page (Preview)

Height Multiplier System — this section looks like a real book page so readers trust the content.

HEIGHT MULTIPLIER TABLE (Base Level = 12 ft)

● Copy for your preview PDF

Roof Height	Timber Multiplier	Sheet Multiplier	Labour Multiplier	Comfort Level
10 ft	×0.85	×0.90	×0.90	Low
12 ft	×1.00	×1.00	×1.00	Medium
15 ft	×1.10	×1.08	×1.10	High
18 ft	×1.20	×1.15	×1.20	Very High
20 ft	×1.30	×1.20	×1.30	Premium

How to Apply This (Example)

If a building at 12 ft uses 200 pieces of 2×4 timber and 250 sqm of sheets, then at 15 ft:

Timber = 200 × 1.10 = 220 pieces
Sheets = 250 × 1.08 = 270 sqm

Table of Contents (Website Excerpt)

THE ROOFING COST BIBLE — The Complete Nigerian Guide to Accurate Roofing Estimates, Timber Quantities, Sheet Calculations & Scam Prevention.

Front Matter Start here

Dedication
Acknowledgements
About the Author
Copyright Notice
Introduction
How to Use This Book

PART 1 — Understanding Roofing Basics Foundation

Chapter 1 — What Every Homeowner Must Know Before Roofing (foundations, heights, sheet types, common mistakes)
Chapter 2 — Introduction to Hip Roofs & African Roof Design (angles, heat, water control)
Chapter 3 — Roofing Geometry: Pitch, Angles & Height Levels Explained (10 ft–20 ft systems)
Chapter 4 — Roof Height & Comfort: Choosing the Right Level (cooling, ventilation, aesthetics, cost balance)

PART 2 — Accurate Timber & Sheet Calculations Core System

Chapter 5 — Timber Sizing & Functions (3×4, 2×4, 2×3, 2×2)
Chapter 6 — Height-Based Timber Multiplier System (10–20 ft)
Chapter 7 — Building-Type Timber Tables & Calculations (2-bed, 3-bed, duplex, etc.)
Chapter 8 — Roofing Sheet Calculations (stone-coated & aluminium)
Chapter 9 — Real Sample Roofing Costing (10ft–20ft breakdown)

PART 3 — Practical Roofing Execution Examples

Chapter 10 — Full Breakdown for 2-Bedroom Bungalow
Chapter 11 — 3-Bedroom Roofing Breakdown
Chapter 12 — 4-Bedroom Duplex Roofing Breakdown
Chapter 13 — Multi-Unit Roofing (2 Units – 5 Units)
Chapter 14 — Height-by-Height Tables: 10ft, 12ft, 15ft, 18ft, 20ft
Chapter 15 — Roof Accessories & Their Functions (ridges, hips, valleys, flashings, sealants)

PART 4 — Professional Tools, Templates & Checklists Pro Tools

Chapter 16 — Roofing Cost Templates (developer tools)
Chapter 17 — Professional Roofing Quotation Template
Chapter 18 — Roofing Inspection Checklist (quality control)
Chapter 19 — Roofing Safety Guidelines
Chapter 20 — Roofing Material Specification Guide (what to buy & reject)
Chapter 21 — Roofing Maintenance & Lifespan Guide
Chapter 22 — Roofing Faults, Troubleshooting & Repairs
Chapter 23 — Roofing Contractor Hiring & Verification Guide

PART 5 — Money, Protection & Smart Decision Making Protection

Chapter 24 — Roofing Budgeting & Cost-Control Strategies
Chapter 25 — Roofing Myths vs Facts
Chapter 26 — The Future of Roofing in Africa (innovation & smart technologies)
Chapter 27 — Roofing Buyer’s Guide (materials, timber, sheets, accessories)
Chapter 28 — Roofing Contract & Payment Dispute Prevention Guide

PART 6 — Tools, Final Words & Closing Finish Strong

Chapter 29 — Roofing Tools & Equipment Guide (basic to digital)
Chapter 30 — Final Conclusion, Author’s Note & Call to Action
Appendices A–E (tables, multipliers, charts, checklist, glossary)

Tip: Place a “Download Sample Pages” PDF under this section for higher conversions.

Buy Now (Selar) Meet the Author

About the Author

Roofing consultant • builder • construction cost expert • transparency advocate.

Short Bio

Itimah Eromosele Francis is a Nigerian roofing consultant, builder, and construction cost expert with over 25 years of hands-on experience. He helps homeowners and developers calculate accurate roofing costs, verify timber quantities, choose the right roof height, and avoid common site scams.

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Full Bio

Itimah Eromosele Francis is a seasoned builder, roofing consultant, and construction cost expert with more than 25 years of practical experience across Nigeria and Africa. He specializes in roofing cost analysis, timber estimation and verification, roofing sheet calculations (stone-coated and aluminium), site supervision and quality control, scam prevention and contractor verification, and height-based roofing systems (10ft–20ft).

He is the founder of Felt Solution Nigeria and the creator of Build Smart African, where he teaches thousands of homeowners, artisans, and developers how to build smarter and avoid costly mistakes. His mission is simple: to bring accuracy, clarity, and transparency to the roofing industry—one project at a time.

Frequently Asked Questions

Answers that remove doubt before purchase.

Q: Does this book give exact quantities?

Yes — it provides building-type timber tables and height-based multipliers to adjust correctly.

Q: Can I use it without an engineer?

Yes — it’s written for homeowners, but still encourages professional verification for structural safety.

Q: Does it work across Nigeria?

Yes — prices vary by region, but the calculation method and verification system remain reliable.

Q: Is it only for homeowners?

No — developers, site supervisors, foremen, carpenters, and students also use it as a training reference.

Ready to build smart?

Buy The Roofing Cost Bible now and learn to verify timber quantities, calculate sheets correctly, budget with confidence, and stop scams before they start.

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Legal Disclaimer

This book is for educational purposes only. Building projects vary by design, location, materials, and workmanship. Readers should verify measurements, material specifications, and contractor claims independently. The author is not liable for losses or outcomes resulting from misuse of the information.